Telegraph transmitting-machine.



J. C. J. ALDERSON. TELEGRAPH TRANSMITTING MACHINE.

APPLICATION FILED SEPTA, 1906.

91 3,183,, Patented Feb. 23, 1909.

I mnnn i BD mlnesse 1111762111101";

JOHN CHRISTOPHER JAMES ALDERSON, OF EL CASCO, CALIFORNIA.

Tennessee raANsnrrrme-tmcnnm' Speciflcationof Letters Patent.

Patented s n-2e, lees.

Applieationfiled September 4, mos. Serial No. aaaeeo.

To all whom it may concern:

Be it iknown that I, J. C. J. Awnasox, a citizen of the United States, residing at 1310115100, in the county of Riverside and State of California, have invented a new and useful Tele raph Transmitting-Machine, of which the f lowin is a specification.

My inventionre ates'to an improved telegraph transmitter in which a mechanical device is utilized to assist the operator in sending messages, and the prime object of my invention is to provide a transmitter by which messages may be sent at a high rate of speed. I

.A further object is to provide an instrument which may be operated without any great amount of skill on the part ofthe oper-- ator. y A further object is to provide a dew'ce which will eliminate the individual peculiarities of the'operator and render the transmission of messages more nearly uniform.

A still further object is to provide a trans mitter which re uires a small. amount of physical exertion or its operation.

accomplish these objectsby means of the device described herein and illustrated in the accompanying drawings, in which-- Figure 1 is a plan view of my improved transmitter; Fig. 2 is an end elevation of the same; and 13g. 3 is aside elevation of the same.

The salient feature of improved transates 'in the manner common to te egraph keys while the dot key is connected to and operates the mechanism which is adapted to mechanicall send over the wires any number of dots esired in rapid succession.

A base plate A is provided for the instrument, being preferably made of metal so as to form one side of the electric circuit, as will behereinafter described. Upon base plate A are mounted two sending keys 0 provided with pivots D restin in set screws E. Screws Gare rovided'at t e rear ends of keys 0 to limit t eir movements and springs F at their front end hold them in their normal positions. The dashkey is provided with a contact H which is adapted on its downward movement to touch an insulated contact I on base plate A grid thereby establish connection from binding post BC throu h strip BF, strip BG contact I, contact H, coy C, screws it an base plate A back to binding post BL .at-- tached to the base plate. Binding posts BC are provided with screws BE for the pun pose of holding the line wires.

A bell crank lever J is pivotally mounted in set screws K attached to studs L and is provided with an upwardly extending arm with an adjustin screw at its upper end. A spiral spring M olds thehorizontal arm of bell crank lever J in contact with dot key C. The screw in the upper end of bell crank lever J normally contacts with and presses to one side an-adjustable weight mounted on the end of a flat spring N whose other end is secured in a circular boss P mounted on base plate A. Projecting from boss P are (two rods R upon which isslidably mounted a plate Q provided with a slot for the reception of flat springnN. A set screw S is as ed to bear against fiat spring N and plate Q at any desired pointon the spring, and the osition of plate Q will determine the rapidity of vibration of spring N which ma be adjusted to suit the needs of th divid'ual operator. Spring N is PIOA ZLiQAJl with a contact adapted to touch contact O mounted on a flat vertical spring Us: ed to a stud W on base late A. S ring U is t cured to the stud by screw and adjustable by an ad'usting screw X which bears against its inner i'ace.

The contact on spring N is normaib;

out of enga ement with contact 0 by the up or end of bell crank lever J, but when the dot key C is'depressed bellcrank lever J moved away from s ring N and the spring; allowed to vibrate reel until dot kev is t released. During the vibrations of so its contact engages with contact C as u spring N completes a vibration, and pressing dot key C a sufiicient length o tune any number of engagements of those two contacts may be effected. Contact 0 is con-- nected by strip BF to binding post BC a" d. u on engagement with the contact on L a circuit is set up from binding ost through strip BF, contact 0, spring l\, hr and base plate A back to the other bin post BC. The speedat which the dots Sn ceed each other may be re ulated by the ad- 'ustment of the position oi plate Q on spring ll to suit the length of line and the speed at which the operator Wishes to send.

. In the operation of my device the operator depresses the dash and dot keys to form the letters comprising the message which he wishes to send. To depress these keys only one hand need be used,,the dot key being depressed by one fin er and the dash key by another. A switch pivoted at Z to base plete A is provided to close the circuit at the terj In a telegraph instrument, the combinw tion of a vibrator constituting one terminal of an electric crreult, rods, n plate shdably mounted on the rods and adjustably connected to the vibrator for regulating the vibration thereof, a stationary contact coopersting with the said vibrator, a spring-controlled lever normally in engagement with the vibrator, and akey adapted to actuate the lever for releasing the vibrator.

Signed at liedlends, in the county of San Bernardino and State of California, this 17th day of July, 1906.

JOHN ClilllS'lOPllER JAMES ALDERSON.

Witnesses:

JOHN P. HIGI-IT, Jr, C. E. HARPER. 

